Efficient deep eutectic solvents catalyzed synthesis of pyran and benzopyran derivatives

Magnetically separable g‐C3N4 hybrid nanocomposite: Highly efficient and eco‐friendly recyclable catalyst for one‐pot synthesis of α‐aminonitriles

“…In continuation of our efforts to develop environmentally benign solvents and catalysts for useful organic transformations, herein, we report a very effective and green procedure for the one‐pot synthesis of diverse racemic α‐aminonitriles in excellent yields using magnetic g‐C 3 N 4 as an inexpensive and environmentally benign catalyst under mild conditions. The presented method not only uses a cost‐effective and magnetically recoverable catalyst and environmentally benign solvent, but also experimentally safe and easy‐to‐handle TMSCN as reagent.…”

Deep Eutectic Solvents for Organocatalysis, Biotransformations, and Multistep Organocatalyst/Enzyme Combinations

“…Likewise, the same 1:2 ChCl/urea (molar ratio) DES was used as the catalyst and solvent to afford benzopyran and pyran derivatives by the one‐pot three‐component reaction of 1,3‐dicarbonyl compounds (acetyl acetone, ethyl acetoacetate, and dimedone), aromatic aldehydes, and malononitrile (Scheme ) . The reactions were performed at 80 °C and rendered high isolated yields (75–95 %).…”

“… Synthesis of pyran and benzopyran derivatives in DES using different aldehydes, malonitrile, and 1,3‐dicarbonyl compounds …”

Choline chloride and itaconic acid-based deep eutectic solvent as an efficient and reusable medium for the preparation of 13-aryl-5H-dibenzo[b,i]xanthene-5,7,12,14(13H)-tetraones

“…The ease of preparation, availability, cost effectiveness, stability, less toxicity, and biodegradability make these DESs versatile alternatives to ionic liquids. In view of some previous works [26][27][28][29][30][31][32][33][34][35][36][37][38] and our recent research programme on the development of novel and environmentally benign synthetic methodologies [39][40][41][42][43][44][45], herein we report ChCl/itaconic acid as reaction medium and catalyst for the synthesis of 13-aryl-5H-dibenzo[b,i]xanthene-5,7,12,14(13H)-tetraones by condensation of 2-hydroxynaphthalene-1,4-dione with aldehydes (Scheme 1).…”